package com.passer.toolbox.common.core.util;


import com.passer.toolbox.common.core.exception.UtilException;

import java.lang.management.ManagementFactory;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

public class DateUtils {

    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";

    private static final String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM",
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};

    /**
     * 获取当前Date型日期
     *
     * @return Date() 当前日期
     */
    public static Date getNowDate() {
        return new Date();
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     *
     * @return String
     */
    public static String getDate() {
        return dateTimeNow(YYYY_MM_DD);
    }

    public static String getTime() {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static String dateTimeNow() {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static String dateTimeNow(final String format) {
        return parseDateToStr(format, new Date());
    }

    public static String dateTime(final Date date) {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static String parseDateToStr(final String format, final Date date) {
        return new SimpleDateFormat(format).format(date);
    }

    public static Date dateTime(final String format, final String ts) {
        try {
            return new SimpleDateFormat(format).parse(ts);
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate() {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算两个时间差
     */
    public static String getDatePoor(Date endDate, Date nowDate) {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endDate.getTime() - nowDate.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }

    /****
     * 将Date 类型转换 Calendar
     * @param date 日期
     * @return Calendar
     */
    public static Calendar parseCalendar(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        return calendar;
    }

    /**
     * 获取两个日期之间的所有月份 (年月)
     *
     * @param startTime 开始月份
     * @param endTime   结束月份
     * @return YYYY-MM
     */
    public static List<String> getMonthBetweenDate(String startTime, String endTime) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");
        // 声明保存日期集合
        List<String> list = new ArrayList<>();
        // 转化成日期类型
        Date startDate;
        Date endDate;
        try {
            startDate = sdf.parse(startTime);
            endDate = sdf.parse(endTime);
        } catch (ParseException e) {
            throw new UtilException(e);
        }
        // 用Calendar 进行日期比较判断
        Calendar calendar = Calendar.getInstance();
        while (startDate.getTime() <= endDate.getTime()) {
            // 把日期添加到集合
            list.add(sdf.format(startDate));
            // 设置日期
            calendar.setTime(startDate);
            // 把日期增加一天
            calendar.add(Calendar.MONTH, 1);
            // 获取增加后的日期
            startDate = calendar.getTime();
        }
        return list;
    }

    /**
     * 格式化毫秒数字为 X年X月X天X小时X秒X毫秒
     *
     * @param millis 毫秒
     * @return X年X月X天X小时X秒X毫秒
     */
    public static String formatMillis(long millis) {
        long ms = millis % 1000;
        long day = millis / 86400000;
        long hourMillis = millis % 86400000;
        long hours = hourMillis / 3600000;
        long minutesMillis = hourMillis % 3600000;
        long minutes = minutesMillis / 60000;
        long seconds = minutesMillis % 60000 / 1000;
        return (day > 0 ? day + "天" : "") + (hours > 0 ? hours + "小时" : "") + (minutes > 0 ? minutes + "分钟" : "") + (seconds > 0 ? seconds + "秒" : "") + (ms > 0 ? ms + "毫秒" : "");
    }
}
